CVE-2026-20138 describes a vulnerability in Splunk Enterprise versions below 10.2.0, 10.0.2, 9.4.7, 9.3.9, and 9.2.11, where a highly privileged user in a Splunk Search Head Cluster could view sensitive Duo Two-Factor Authentication secrets in plain text within the _internal index. This medium-severity vulnerability (CVSS 4.9) has a low attack complexity and requires high privileges, but could lead to a complete compromise of confidentiality for these critical authentication keys. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 10.0, < 10.0.2CPE match | cpe:2.3:a:splunk:splunk:*:*:*:*:*:*:*:* | ||
>= 9.2, < 9.2.11CPE match | cpe:2.3:a:splunk:splunk:*:*:*:*:*:*:*:* | ||
>= 9.3, < 9.3.9CPE match | cpe:2.3:a:splunk:splunk:*:*:*:*:*:*:*:* | ||
>= 9.4, < 9.4.7CPE match | cpe:2.3:a:splunk:splunk:*:*:*:*:*:*:*:* | ||
>= 9.2.0, < 9.2.11CPE matchmatch criteria | cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.